L carnitine ameliorates bile duct ligation induced liver fibrosis via reducing the nitrosative stress in experimental animals: preclinical evidences: Heliyon L carnitine is primarily synthesized in the liver from the amino acids lysine and methionine through a series of four enzymatic reactions, with the liver and kidneys converting the precursor butyrobetaine into active Antioxidant, antiapoptotic, antigenotoxic, and hepatic ameliorative effects of L carnitine and selenium on cadmium induced hepatotoxicity and alterations in liver cell structure in male mice ScienceDirect Effect of l carnitine supplementation on lead acetate induced liver cell apoptosis and inflammation: role of caspase 3 and glycogen synthase kinase 3 enzymes ScienceDirect Molecular Medicine Reports